1. İzmir Katip Çelebi University Atatürk Training and Research Hospital, Clinic of Obstetric and Gynecology, İzmir, Turkey

2. Düzce University Faculty of Medicine, Department of Obstetric and Gynecology, Düzce, Turkey

3. Bolu İzzet Baysal State Hospital, Clinic of Obstetric and Gynecology, Bolu, Turkey

4. Medar Private Hospital, Clinic of Obstetric and Gynecology, Kocaeli, Turkey